/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 * 
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 * 
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.protocols.ss7.isup.impl;

import java.util.concurrent.ConcurrentHashMap;
import java.util.Iterator;

import org.mobicents.protocols.ss7.isup.CircuitManager;

/**
 * @author baranowb
 *
 */
public class CircuitManagerImpl implements CircuitManager {

	//ansi allows 14 bits for cic and 24 bits for point code = 38 bits
	//itu allows 12 bits for cic and 14 bits for point code = 26 bits
	protected ConcurrentHashMap<Long, Integer> cicMap = new ConcurrentHashMap<Long, Integer>();
	/* (non-Javadoc)
	 * @see org.mobicents.protocols.ss7.isup.CircuitManager#addCircuit(int, int)
	 */
	@Override
	public void addCircuit(int cic, int dpc) {
		cicMap.put(getChannelID(cic,dpc), dpc);
	}

	/* (non-Javadoc)
	 * @see org.mobicents.protocols.ss7.isup.CircuitManager#removeCircuit(int)
	 */
	@Override
	public void removeCircuit(int cic,int dpc) {
		cicMap.remove(getChannelID(cic,dpc));		
	}

	/* (non-Javadoc)
	 * @see org.mobicents.protocols.ss7.isup.CircuitManager#isCircuitPresent(int)
	 */
	@Override
	public boolean isCircuitPresent(int cic,int dpc) {
		return this.cicMap.containsKey(getChannelID(cic,dpc));			
	}
	
	/* (non-Javadoc)
	 * @see org.mobicents.protocols.ss7.isup.CircuitManager#getChannelIDs()
	 */
	@Override
	public long[] getChannelIDs()
	{
		long[] x = new long[this.cicMap.size()];
        Iterator<Long> it = this.cicMap.keySet().iterator();
        int index = 0;
        while(it.hasNext())
                x[index++] = it.next();

        return x;
	}	
	
	/* (non-Javadoc)
	 * @see org.mobicents.protocols.ss7.isup.CircuitManager#getCIC()
	 */
	@Override
	public int getCIC(long channelID)
	{
		//get last 14 bits
		return (int)(channelID & 0x3FFF);
	}
	
	/* (non-Javadoc)
	 * @see org.mobicents.protocols.ss7.isup.CircuitManager#getDPC()
	 */
	@Override
	public int getDPC(long channelID)
	{
		return (int)(channelID >> 14);
	}
	
	/* (non-Javadoc)
	 * @see org.mobicents.protocols.ss7.isup.CircuitManager#getDPC(int,int)
	 */
	@Override
	public long getChannelID(int cic,int dpc)
	{
		long currValue=dpc;
		currValue=(currValue<<14) + (long)cic;
		return currValue;
	}
}
